Narrowing searches based on url, author, date, and other attributes is also possible. For instance, the query [ Streisand sourcename:Techdirt ] restricts searches for "Streisand" to items from the blog "Techdirt".
Examples of other operators follow:

sourceurl:http://www.theverge.com/

items from the blog http://www.theverge.com/

sourcename:"New York"

items from blogs with "New York" in the name

date:10/20/11

items that appeared on 10/20/11

date:[10/1/11 TO 10/20/11]

items appearing between 10/1/11 and 10/20/11

author:"Bill Gates"

items by author "Bill Gates"

title:unsubstantiated

items with "unsubstantiated" in the title

body:"severely polluted"

items with "severely polluted" in the body

link:http://www.marco.org/2011/04/16/rumored-apple-hdtv

items linking to http://www.marco.org/2011/04/16/rumored-apple-hdtv

Note: all operators that take urls will accept simple domain names, which match any item at that domain, or complete item urls.

The Billion Dollar Valuation Club
— Aileen Lee has a really good post up on TechCrunch, in which she analyzes the number of companies that have been started since 2003 that have gone on to be worth $1bn or more. — This is a very useful exercise in the VC business since it is these big wins …

Mentor/Investor Whiplash
— I've been doing a tour of the summer accelerator programs and a question I get a lot is about the feedback the teams get from the investors and mentors they meet with. They ask me how much should they react to the feedback they are getting advising them to do things differently …

Let The Games Begin
— That was my partner John's email response when the news came across our internal email list that the SEC had finally lifted the General Solicitation Ban as they were asked to do by Congress in Title II of the JOBS act. — What this means is that folks raising capital …

Valuation vs Ownership
— I am talking at the PreMoney conference today (via Skype) and I woke up thinking about the challenges facing the VC industry. I hope to talk a bit about this at the conference. — Some investors are ownership focused. They want to own 20% of the business but care less about the valuation.

Product > Strategy > Business Model
— One of the mistakes I see entrepreneurs make is they move to business model before locking down strategy. The way I like to think about this is get the product right first, then lock down the strategy of the business, then figure out the business model.

You Can Do Too Much Due Diligence
— It's Monday, time for another lesson I've learned in the venture capital business. Today I will tell a story that I love telling. It has some of my favorite people in it. — Back in 2004, early in my blogging career, I heard about a service that had just launched called Feedburner.